Rotary pump



Get. 28, I924; 1,512,934

' O. JACOBSEN ROTARY PUMP Filed Oct. 5. 1923 w '0. w i v g a g I II I a f s M J a I m 5 v o E Q i I INVENT R av w OYSTEIN moonsnn, or DAYTON, 0210, Assrencn To see nunrnon oonrnny; Inc,

rennet earner series.

A CORPORATION GF NEW-$93K.

ROTARY P'UIVIP.

Application filed October 5, 1923,

Y 0 all whom it may concern:

Be it known that l, OYsTnIN 'JAOOBSEN,

a citizen of the United States, and a reel-' dent of Dayton, in the county of Montgomery and State of Ohio, have made a new and useful invention in Improvements in Rotary Pumps, of which the following is a of wear, as the parts subject to the 1;; "eatest wear are. self ad usting to compensate for I such wear, and (3) which is so constructed that the finishing or machine work on the parts is reduced to a minimum, rendering the pump particularly adaptable for con-, struction from acid resisting material, such as high silicon iron, which is exceedingly hard. One embodiment of the invention illustrated in the accompanying drawings wherein .liigure 1 is a longitudinal section through the pump with mounting or base in side elevation. rind Fig. 2 is a transverse section on the linell-ll of Fig. 1.

Referring to the drawings, 1 is the base plate of the machine provided with three iiipstanding arms 2, 3 and l in which the shaft 5 of the pump is journalled. Mounted on theshaft is a pulley 6 by means of which the shaft is driven. Also carried by and secured to the shaft is the sleeve 5, and integral therewith is the rotor 7 of the pump, such rotor consisting of a disc,

which is eccentric with respect to the axis of the shaft.

The casing of the pump consists of the pair of opposing side plates 8 and 9 and the annular central member 10 clampedbetween the side plates by the bolts 11, such central member being provided with the base 12 (Fig. 2) secured to the base plate 1 by means of the stud bolts 13.

The side plates 8 and 9 are provided with the laterally extending stuiling boxes i l and 15, carrying the packing 16 and having the follower members 17 and 18.

The central member 10 has its. cavity concentric with the axis of the shaft 5 and is provided with the inlet or section passage 19 and the discharge or outlet passage plates 8 and 9.

" Serial No. sees-e4.

20. The wall of the central member is also provided with the transverse bearing cavi. ties 21 and extending entirely through the member to permit of the insertion of the lowerends 23 and Q-l of the pawl shaped valve members 25 and 26 before the central member is clamped between theside V The valve members 25 and 2G 'yieldingly engage the periphery of the I rotor 7 by reason of their weight, thus eliminat ng any requirement for springs. The arrow indicates the I the rotor, and the dotted lines (Fig. 2) show the position of i when thereto is at a position of rotation 180. degrees from that indicated in full lines.

In operation the water entering at the suction inlet lQ fiscarried around by the eccentric rotor in a'count er clockwise direce tion and discharge through the outlet 20/ The valve 26 autoniaticall I lifts" to permit the passage of the water, and acts as i check valve to prevent any back flow from. the outletQO, since any back pressure acting upon the upper side of the valve member presses it against the periphery of the rotor. The valve 25 is always in contact with the rotor, dueto the fact that the suction on the lower side of the valve and the pres sure on its upper side combine to pressit against'the rotor. ll1is prevents any leakage of liquid from'the' discharge outlet to the suction inlet during the operation of the pump, thus insuring a steady flow from the pump, and when the movement of the rotor is discontinued, the valve still acts to prevent any leakage back to the inlet.

It will be seen that the apparatus is of very simple construction, requiring a minimum amount of finishing work, which is a highly desirable condition when very hard acid-resisting material, iron, is employed. The valve members 25 and 26 may be made of thesame material as the body of the pump and require no finishing, except on the limited areas, which contact with the rotor, which surfaces are readily ground. "The positioning of the valves so that they may be operated by gravity is advantageous as this avoids the complications and upkeep diiiiculties incidirection of rotation of therotor and valve members such as high silicon or frequent replacement. 'The method of pivoting the valves is simple and cheap. No finishing of the parts at these points is required, the cavities 21 and 22 being cored out, and the parts are readily assembled before the side plates are bolted on. The wear between the valves and rotor does not affect the efficiency of the apparatus and such wear is very slight where hard acid resisting metal is used, so that the pump will run indefinitely 'without adjustment or repair. The use of the sleeve 5 integral with the rotor and of the same acid resisting material gives protection to the shaft 5 against the liquid of the pump and permits the use of ordinary shafting which is more suitable for this purpose than is the composition from which the sleeve is made. Other advantages of the construction will be readily apparent to those skilled in the art.

What I claim is:

1. In combination shaft-with a rotor in the form of an eccentricf disc carried thereby, a pump casing having a chamber concentric with respect to the axis of the shaft in which the rotor is mounted, and having inlet and outlet passages leading through the walls of the cham- 'ber' opposite the periphery of the rotor, and

a pair of gravity. valves pivoted in the cas ing on opposite sides of the outlet passage and having their free ends in engagement with the periphery of the rotor throughout the rotation thereof, both of the valves beingarranged to prevent a back flow of in a rotary pump, a,

liquid from the outlet passage around the mounted with the axis of the shaft concen-.

trio with the opening in'the casing, and side plates through which the sleeve extends clamped to the opposite sides of the central casing member, the said central casing member being provided with an inlet passage and an outlet passage.

3. In combination in a rotary pump, a sleeve having a rotor integral therewith in the-form of an eccentric disc, a shaft extending through the sleeve, a central annular casing member in which the rotor is mounted with the axis of the shaft concentric with the opening in the casing, and side plates through which the sleeve extends clamped to the opposite sldes of the central casing member, the said central casing member being provided with an inlet passage and an outlet passage,and such member, the side plates, rotor and sleeve being of corrosion resisting metal.

In testimony whereof, I have hereunto subscribed my name this third day of October, 1923. V

O. J ACOBSEN. 

